Didn't know that in details because I left earlier.
But in my experience it was a bit easier to "control," or maybe that is because I was writing for a population of certain language.
Broken tagging system is better then not at all. I don't know though.
I also think it is incredibly easy for Tapas to fell into the same fate as wattpad, or like any other site which exist. I meant there must be so many novelist here that have never been featured. Probably the best strategy is to hunt for new hosting site, be a pioneer, and reap everything once it get big; but that requires incredible analysis, foretelling, and luck